Contouring-machine



c. E. RISSER.

CONTOURING MACHINE.

I APPLICATION FILED AUG-I7- I917. 1,387,182.

Patented Aug. 9, 1921.

I I I WITNESSES:

2 SHEETS-SHEET I.

C. E. RISSER.

CONTOURING MACHINE. APPLICATION flLED Aue.17, 1917.

Patented Aug. 9,1921.

2 SHEETS-SHEET 2.

i neg CHARLES EUGENE RISS'ER, OF DAYTON, OHIO,- ASSIGNOR TO THE CRAWFORD,

MCGREGOR AND CANBY COMPANY, OF. DAYTON, OHIO, A CORPORATION OF- V OHIO.

Application filed August 17, 1917. Serial No.- 185,712.

To all whom it may concern:

Be it known that 1, CHARLES E.-Rrssnn, citizen of the United States, residing atfiayton, in'the county of Montgomery and State ofadaptation to the heel contouring operation upon shoe lasts, it is to be understood that it is not limited to this use or application, but is applicable to the contouring or shaping of other articles. I c

The object of the invention is to improve the structure, as well as the means and mode of operation of such apparatus whereby it will not only be cheapened in construction, but will be more efficient in use, positive in operation, accurate, economical, easily controlled, and unlikely to get out of repair.

A further object of the invention is to provide an improved form ofcutter head having a draw cut action and to further provide improved forms of cutter blades having alternately arranged saw teeth for effecting the cutting action of the apparatus.

A further object of the invention isto provide improved means for controlling the cuttingoperation to, produce a predetermined contour.

A'further object of the invention 1s to provide improvedmeans for regulating the contour controlling devices whereby the position of the contoured surface may be va-' ried in its relation 'to the body of the a rticle.

A further object of the invention is to provide an improved form of swinging carrier for the work or article operated upon.

With the above primary, and other incidental objects in view as will more fully appear in the specification, the invention consists of the features of construct-ion, the parts and combinations thereof, and the mode of operation, or their equivalents, as.

hereinafter described and set forth in the claims. g

vThe'preferred form of several forms of embodiment of my invention is illustrated in the accompany ng drawings, in which Specification of Letters Patent.

conronnnvdmacnmn.

Patented Aug. 9,

'Figure 1 is a top plan view of the assembled machine or apparatus. Fig. 2 isa side elevation thereof. Fig. 3 is a detailside elevatlon of the templet adjusting means. Fig.

4 is a. detail bottom plan view of the templet tion of the revolubl e cutter headshowing the elevation of a shoe last upon which is indisupporting means. Fig. 5 is a front 'eleva-.

cated by dotted lines the contouring operation to be performed. I

Like parts are indicated bysimilar Ichar- 'acters of reference throughout the several views.

In the turning of wooden shoe lasts. or

other articles which may be produced in pattern lathes or by like lmechanism, there is left at one or both ends ofthe article a neck or spruepro-jecting beyond the normal lines of the article by whichit was engaged by the I chuck or center of the-lathe according to the end upon which said extension or neck eX- sts, dur ng the processcf turning. Inasmuch as the lathe cannot reduce that portion of the article, by which the work is held, the

byother means. Heretofore, various meth ods of contouring or shaping the ends of such artlcles have been employed suchas shaping ofthe terminals must be'efi'ect'ed I bandsawing, wabble sawing, by use of abrasive wheels or tools and by manual operation. By such means, however, it has been diflicult to control the operation to such degree that every piece will b'e'iden'tical in contour or shape. p The present apparatus is designed tosemiautomatically reduce the terminal of the article to a predetermined contour by a' combined sawing and cuttlng operation whlch [will produce the, desired outline without chipping, checking or the work.- In Fig.

otherwise mutilating 7 there is shown the outlineof a shoe last, the heel portiono-f which has been shownby solid lines as it leaves the chuck, of the lathe. .By dotted lines in saidfigure. the contour of the finished heel of the lastv .has been indicated.' The purposezof the present apparatusis'to remove the excessive material from the'heel, reducing it to a pree determinedoutline or contour, as indicated I by dotted lines in saidFig'. 7 1 Referring to the'drawings, 1 is the main frame of the machine or table upon which the operating portions of the apparatus are mounted. Secured to the top of the frame or table 1 are uprights or standards 22 in which is mounted the main drive shat which carries intermediate said standards 2-2 a. drive pulley 3. The main drive shaft carries at its forward end a revoluble cutter head i the face of which as shown in Fig. 5 presents a surface having therein a plurality of tangentially arranged slots 6. In Fig. 5, there has been shown a series of four of said slots. It is to be understood, however, that the number of slots may be varied. In practice, quite good results have been obtained by the use of three slots. The back of the cutterhead l has been'recessed or cut away to form a series of inclined bearing faces or surfaces 7 obliquely arranged in relation with the flat face of the cutter head and intersecting said cutter head a the outer edges of the tangentially arranged slots 6. Adjustably mounted upon each of the in clined faces or surfaces 7 of the cutter head is a cutter blade 8 the operative edge of which overhangs the outer edge of the slot 6 and is provided with a series of angular serations or saw teeth 9. The saw teeth are formed in the cutter blade preferably at an inclination to the plane of the blade whereby the t'ansverse line of the tooth, that is the line of the point, will be substantially parallel with the axis of. rotation of thehead although it has been found in practice beneficial to give the cutting blade a slight clearance on the heel or rear of the last. That is to say, the transverse face of the cutting blade is not exactly parallel with the axis of oscillation but is inclined slightly rearwardly and away from the center of oscillation whereby the forward side of the cutting blade will be thrust slightly deeper into the work.

Not only are the cutting blades 8 serrated or provided with saw teeth, but the teeth of succeeding blades are oppositely disposed, that is to say, the teeth of each succeeding blade 8 are arranged in reverse relation whereby the teeth of one blade inclined toward the right and the next blade towardthe left. These cuttmg blades 8 are attached to the inclined faces 7 upon the rear side of the revoluble head l by means of clamp bolts 10 which engage in slots 11 in said cutter blades. By this means the cutter blades may be adjusted upon the head independent of each other to a proper working position.

As the work is pressed against the face of the revoluble cutter head in the position shown in Fig. 5, the cutting blades 8 are not only given a slicing or cutting action but they are also given a draw cut by which a sawing operation is afforded. This will be best illustrated by the series of dot and dash lines in Fig. 5 illustrating successive positions of the cutter blade in approaching and cutting through the work. By comparing given point upon the work with the extremity of the cutting edge where it intersects the periphery of the head, it will be seen that in each successive position a different point upon the cutting edge is brought into operative engagement with the work whereby a considerable length of the cutting edge is utilized. There is thus afforded a peculiar combination of a chopping or slicing and a sawing-operation which is found very effective in removing the small portion of material ordinarily necessary to be removed. The stem of the chuckneck or spud is ordinarily so short'that it cannot ordinarily by any means he removed in one piece but is disintegrated in its removal. The present device rduces this portion to sawdust without marring or tearing the body of the article which has been a common fault of the method heretofore employed.

In order to support the work during the contouring operation there is provided a swinging carrier comprising upright rock arms 12 carried upon a transverse rock shaft 13 mounted in suitable bearings 1% upon the main frame or table 1. Pivoted intermediate the upper or free ends of the rock arms 12 is an oscillating substantially U-shaped yoke 15. In a medial position this yoke 15 carries transverse work supporting platen 16 on which is adjustably mounted a guide or stop 17 against which the work, whether the same be a shoe last or other article is abutted. The, platen 16, preferably although not necessarily, is provided with a scale of graduations by wiiich the stop or abutment 17 may be positioned. The yoke 15 and work p aten forming a part thereof is capable of a double swinging movement. The said yoke swings in its hearings in the upler ends of the rock arm 12 independent of the movement of the rock arm and is capable of a further movement about the axis of the rock shaft 13 in unison with the swinging movei'nent of the arms 12. By the latter of these movements, that is, the swingingof the rock arms 12, the work is moved to and from the revoluble cutter head 4 and by the first of the mentioned swinging movements, that is, the swinging of the yoke in its bearings in the rock arms 12, the work is oscillated while in engagement with the revoluble cutter head in order that the cutting blade may reach all portions of the heel contour.

The oscillatory yoke 15 is provided with an arm 18 carrying a counter balance weight 19 by which the swinging of the yoke is facilitated. The rock arms 12 are normally oscillated toward the cutter head by means a cable 20 attached to one of the rock arms and passing over a guide pulley 21, which cable carries at its lower enda suspended weight, not shown in the drawing.

- In order to predetermine the contour of the terminal, whether same be the heel of the last, or theend of some other article, there is provided a. templet '22 which operatively engages-a stop member-23 and thereby not only predetermines the shape of the surface operated upon but also the length of the article by limiting the surface in its relation with the stop member 17 As'shown in Fig.

3 the templet 22 is shaped to the desiredcontour. The templet 22 is pivoted as at'23 upon a vertically-adjustable head 2i slidingly mounted upon the yoke 15 and controlled by the adjusting screw 25. By adjusting the screw 25 the templet 22 may be raised or lowered in relation to the work upon the platen16. In addition to this vertical adjustmentthe templet is capable of' an oscillatory adjustment about its pivotal connection 23.- "This oscillatory movement is effected by means of a vertically movable slide 27 slidingly mounted in the head 21 and longitudinally adjustableby means of the adjusting screw 28. Slide 27 carries a stud or pin 29 engaging in a slotted opening 30 in the rear end of the templet 22, whereby the vertical adjustment of the slide 27 will effect an oscillatory movement of the templet about its pivot 23. This swinging ad-.

justment varies the degree ofthe general -'direction of the heel surface to the general action of the last or causes the contour to re cede' to a greater or less degree. 'The verti-' cal adjustment of the head 24 and with it the bodily adjustment of the templet, varies the height of'the swell of the last heel. The stop member 23 is adjustable forwardly and rearwardly to vary the point of engagement of the templet by means of an adjusting screw 31.

In operation, the last or other article to be operated upon is placed upon the platen 16 with one end against the abutment 17. The controlling templet 22 having been previously adjusted, the work is swung toward the revolvingcutter head by the oscillation of the rock arms 12 about the axis of the rock shaft 13. With the work pressed in engagement with the face of the revolving cutter head, the yoke 15 is oscillated in itsbear parent that there is thus provided a device of the character described, possessing the particular features of advantage before enumerated as des rable but which obviously is susceptibleof modification in its form, proportion, detail construction or arrangement f of parts, withoutdeparting from the prin-' ciple involved or sacrificing any of its'advantages. I

While in order to comply with the stat-- 'utes, the. invention has been described in] lan ua e more or less saecific as to certain structural features, it is to be understoodthat the invention is not limited to any specific details, but that the means and construction herein describedcomprise but one.

mode of: putting the invention into effect,

broadly iniany of itspossible forms or m0difications within and the invention therefore "claimed the'scope of the appended claims.

Having thus described my invention, I

claim I 1. A machine for shaping the ends of shoe lasts wherein the last is guided through an oscillatory movement in a plane per-' pendicular to the plane of rotation of a rotary cutter headby which the end of the last is reduced to predetermined contour, characterized by a series of cutter blades arranged on said head in angular relation one with the other to agree with the sides of a regular polygonal figure concentric with the 7 center of rotation of the head, the radial distanceof said blades from the center being substantially coincident with the point of,

application of the lastv to the head.

2. A. machinefor shaping the ends of shoe lasts wherein the last is guided through an oscillatory movement in a plane perpendicu-' lar to the plane of rotation of .a rotary cutter headby which the end of the last is reduced to predetermined contour, characterized by a series of cutters carried by said head extending in directions tangential to a circle common to all the cutters and substantially intersecting the point of application of the last to the cutter head. I

a A machine for shaping the ends of shot lasts wherein the last. is guided through anoscillatory movement in a plane perpendicularto the plane of rotation, of a rotary cutter head by which the end of the last is re-' duced to predetermined contour, characterized by a series of cutters carried by the head and arranged in such relation as to successively form portions of the sides of a regular polygonal figureconcentric with thecenter of rotation ofthehead. V

4. A cutter head comprising a flat rotary face plate, and a series of cutting blades carried thereby, said blades being arranged. tangentially to a common circle substantially tangent to the point of application of the work whereby said cutting blades form the successive sides of a polygonal figure, and means for supporting the work in proximity to the circumference of said circle.

mon circle in such relation that the inner end of each blade if projected would inter sect the outer portion or" the succeeding blade of the series, and means for presenting the Work in close proximity to, but outside said circle.

6. A cutter head comprising a rotary member having a series of cutting blades carried thereby, said blades being arranged thereon substantially perpendicular to the radial position of the work at the time of engagement therewith, and means for presenting the work perpendicular to the plane of rotation of the head.

7 A cutter head comprising a rotary face plate and a series of cutting blades carried thereby, each blade extending toward the 20 periphery of the head at right angles to the radius of the head which intersects the right angle cutting blade adjacent to the inner end thereof.

' In testimony whereof, I have hereunto set 25 

